A warning spreading on social media is urging WhatsApp users not to put their real name in their new username, or to reuse a handle already tied to their Instagram, X or Telegram accounts.
The advice comes as WhatsApp rolls out usernames — a feature it began letting people reserve on 29 June and will open more widely later this year — which lets users message one another without sharing a phone number. In a widely shared post, the social-media commentator Joy Das (@Joydas) told followers not to use their real name as a WhatsApp username, and not to reuse their Instagram, Twitter (now X) or Telegram handle either: “Even with passkeys, don’t do it. Thank me later.”
“Do not use your real name as your WhatsApp username. Nor should you keep it the same as your Instagram, X or Telegram handle. Even with passkeys, don’t do it. Thank me later.”
The warning has since gone viral on X, where numerous users have shared similar advice about choosing a new and less identifiable WhatsApp username. Posts repeating the warning have attracted millions of views, with Das’s post receiving about 1.7 million views and another post on the subject drawing more than 2.3 million, according to figures displayed on X.
The concern is not that reusing a handle lets someone hack an account — it doesn’t. The real issue is linkage: a distinctive handle used across several platforms makes it easier for strangers, scammers or data brokers to tie those profiles together and build a fuller picture of a person’s identity and activity.
It helps to know how WhatsApp’s version works. There is no public directory, no search and no autocomplete, so no one can browse or guess their way to your username — they have to know it exactly. WhatsApp has also added an optional “username key,” a short code someone must have on top of your username before they can message you. In practice, then, the linking risk mainly bites once someone already knows your exact WhatsApp handle; from there they can look for the same name on Instagram, X or Telegram, where photos, locations or workplace details might identify you.
Passkeys do not change that. They strengthen log-in security and make phishing and password theft harder, but they do not hide a username or stop anyone from connecting profiles that share the same name.
None of this means everyone needs a different username. Businesses, creators and public figures often want a consistent handle so their official accounts are easy to recognize. For private users, a unique, non-identifying username simply adds a layer of privacy. Whatever you choose, avoid packing in sensitive details — full name, birth year, employer or location — and keep your privacy and account-security settings switched on.
Verdict: Mostly sound, slightly overstated. Reusing your real name or an existing handle won’t compromise a WhatsApp account on its own, but it can make it easier to connect your profiles across platforms. Because WhatsApp usernames aren’t searchable, that risk chiefly applies once someone already has your handle. Privacy-minded users may prefer a separate, low-information WhatsApp username; businesses and public figures may have good reason to stay consistent.
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